Statements of Income and Expenses - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment Income:
Interest income		$ 249,477	$ 295,600	$ 65,647
Interest income allocated from the Funds		355,473	134,011	112,109
Total investment income		604,950	429,611	177,756
Expenses:
Expenses allocated from the Funds		245,247	215,927	415,196
Clearing fees related to direct investments (Note 3c)		169,977	212,968	244,910
Ongoing selling agent fees (Note 3d)		754,873	1,099,026	1,636,843
Management fees (Note 3b)		455,800	767,070	1,210,330
General Partner fees (Note 3a)		380,778	551,024	817,069
Incentive fees (Notes 3a and 3b)		62,039	118,265	301,291
Professional fees		331,300	420,665	422,957
Total expenses		2,400,014	3,384,945	5,048,596
Net investment loss		(1,795,064)	(2,955,334)	(4,870,840)
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net realized gains (losses) on closed contracts		407,871	(1,342,811)	(335,118)
Net realized gains (losses) on closed contracts allocated from the Funds		900,632	340,782	324,297
Net change in unrealized gains (losses) on open contracts		(102,139)	171,993	557,235
Net change in unrealized gains (losses) on open contracts allocated from the Funds		353,252	10,009	(43,431)
Total trading results		1,559,616	(820,027)	502,983
Net Income (Loss)		(235,448)	(3,775,361)	(4,367,857)
Class A Redeemable Units [Member]
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net Income (Loss)		$ (242,481)	$ (3,744,208)	$ (4,367,857)
Net income (loss) per Redeemable Unit	[1]	$ (10.35)	$ (92.11)	$ (73.87)
Weighted average Redeemable Units outstanding		32,138.8723	44,356.5264	62,419.4823
Class Z Redeemable Units [Member]
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net Income (Loss)		$ 7,033	$ (31,153)
Net income (loss) per Redeemable Unit	[1]	$ 10.72	$ (46.69)
Weighted average Redeemable Units outstanding		477.5877	659.7962

[1] Represents the change in net asset value per Redeemable Unit.